Python 3 인덱스 범위를 벗어남 오류

Question

다음 코드는 postgresql 서버에서 실행됩니다.

from datetime import datetime 

now = str(datetime.now(None)) 
procurementinsertqueries=[] 
priceupdatequeries = [] 
inventoryupdatequeries=[] 
ptrcode = -1 
debugcode="" 

try: 
    unpbatches=[] 
    query = "select distinct(fk_procurementbatch_code) from newprocurementlist" 
    proclistresult = plpy.execute(query) 

    for rec in proclistresult: 
     unpbatches.append(rec["fk_procurementbatch_code"]) 

    for batchcode in unpbatches: 
     ptrcode=-1 
     query = "select procurementtransaction_code from procurement where fk_procurementbatch_code="+str(batchcode)+" order by procurementtransaction_code desc limit 1" 
     ptrcoderesult = plpy.execute(query) 

     if len(ptrcoderesult)==0: 
      ptrcode=0 
     else: 
      ptrcode=ptrcoderesult[0]["procurementtransaction_code"] 

     query = "select * from newprocurementlist where fk_procurementbatch_code="+str(batchcode) 
     newproclistresult = plpy.execute(query) 

     for r in newproclistresult: 
      ptrcode+=1 
      _bcode = str(r["fk_procurementbatch_code"]) 
      _pref = str(r["fk_product_ref"]) 
      _up = str(r["unitsprocured"]) 
      _tp = str(r["totalprice"]) 
      _cp = str(r["costprice"]) 
      _sp = str(r["sellingprice"]) 
      _mrp = str(r["mrp"]) 
      _trcode = str(ptrcode) 
      procurementinsertqueries.append("insert into procurement values("+_bcode+","+_pref+","+_up+","+_tp+","+_cp+","+_sp+","+_mrp+","+_trcode+")") 
      priceupdatequeries.append("insert into productpriceupdatelist values("+_pref+")") 
      _aunits = 0.0 
      _newunits = 0.0 
      query="select unitsavailable from inventory where fk_product_ref="+_pref 
      au = -1 
      au = plpy.execute(query) 
      _aunits=float(au[0]["unitsavailable"]) 
      _newunits = _aunits+float(r["unitsprocured"]) 
      inventoryupdatequeries.append("update inventory set unitsavailable="+str(_newunits)+" where fk_product_ref="+_pref) 
      debugcode+="--Completed--" 
     debugcode+="---Loop completed---" 

except Exception as e: 
    plpy.execute("insert into log values(\'"+now+"\')") 
    raise plpy.error("Error generating insert queries-->"+str(e)+"Debug is "+debugcode) 

try: 
    with plpy.subtransaction(): 
     for qry in procurementinsertqueries: 
      plpy.execute(qry) 
     for qry in priceupdatequeries: 
      plpy.execute(qry) 
     for qry in inventoryupdatequeries: 
      plpy.execute(qry) 
except Exception as e: 
    plpy.execute("insert into log values(\'"+now+": Error executing insert queries\')") 
    raise plpy.error("Error executing procurement updates. There could be loss of data.Please review database error log. -->"+str(e)) 

try: 
    plpy.execute("delete from newprocurementlist") 
except Exception as e: 
    plpy.execute("insert into log values(\'"+now+": Error deleting new procurement list table after successful updates\')") 
    raise plpy.error("Error deleting completed procurement list. There could be duplication of data. Review error log file-->"+str(e)) 

try: 
    plpy.execute("select product_price_update_process()") 
except Exception as e: 
    raise plpy.error("Error updating prices. "+str(e)) 

문제는 "범위를 벗어난 색인"오류가 발생한다는 것입니다. 첨부 된 것은 내가지고있는 에로입니다.

ERROR: plpy.Error: Error generating insert queries-->list index out of rangeDebug is --Completed-- 
CONTEXT: Traceback (most recent call last): 
    PL/Python function "procurementlist_process", line 61, in <module> 
    raise plpy.error("Error generating insert queries-->"+str(e)+"Debug is "+debugcode) 
PL/Python function "procurementlist_process" 

for 루프를 사용할 때 인덱스가 범위를 벗어나는 방식을 이해할 수 없습니다.

도와주세요 !!

편집 :

au = plpy.execute(query) 
    _aunits=float(au[0]["unitsavailable"]) 

이의 결과 집합 au가 : 여기 빈리스트가 내 테이블에 테스트 데이터, unpbatches의 항목 수는 아마도 1

Answer 1

au 유의 쿼리? 쿼리가 어떤 행도 반환하지 않았을 수 있습니다.

---

더 일반적으로, 당신은 코멘트에 jknupp의 제안을 따라

raise plpy.error("Error generating insert queries-->"+str(e)+"Debug is "+debugcode) 

그냥

raise 

원래 역 추적 및 오류가 발생한 정확한 라인을 확인하기 위해 변경해야 말하기 .

Answer 2

길이가 0이면 ptrcode을 1로 설정 한 다음 루프를 시작할 때 바로 업데이트합니다. 아마도 0으로 설정하셨습니까?